Map existing systems
List business systems, developers, environments and technical contacts. Record available interfaces and connection constraints. Separate infrastructure integration from a requirement to build a new application.
For each system, identify authoritative data and its update owner. When information exists in multiple places, agree source selection and reconciliation rules.
Follow a representative case
Describe a case from creation and data entry through approval, signing, retention and retrieval. Each exchange needs an input, output, actor and completion signal.
Place identity or payment steps where the use case needs them and identify the result recipient. Not every case needs every module.
Make requirements verifiable
Replace a vague speed request with a defined task and agreed measurement. Replace easy integration with interfaces, data and responsibilities. Do not invent an SLA.
Record dependencies on devices, external services and access. Define what is needed before testing, who supplies it and how readiness is confirmed.
Close scope with acceptance scenarios
Select common cases and important exceptions. Each needs inputs, expected results and an approver. Include lookup procedures for incomplete journeys.
The output should include a system diagram, case flow, data mapping, applicable specifications and operational ownership. This supports capability assessment and implementation planning.
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